5b2ab1d35e
New instructions have been added over time to the eBPF ISA, but
previously there has been no good method to select which version to
target in GCC.
This patch adds the following options to the BPF backend:
-mcpu={v1, v2, v3}
Select which version of the eBPF ISA to target. This enables or
disables generation of certain instructions. The default is v3.
-mjmpext
Enable extra conditional branch instructions.
Enabled for CPU v2 and above.
-mjmp32
Enable 32-bit jump/branch instructions.
Enabled for CPU v3 and above.
-malu32
Enable 32-bit ALU instructions.
Enabled for CPU v3 and above.
gcc/ChangeLog:
* config/bpf/bpf-opts.h (bpf_isa_version): New enum.
* config/bpf/bpf-protos.h (bpf_expand_cbranch): New.
* config/bpf/bpf.c (bpf_option_override): Handle -mcpu option.
(bpf_expand_cbranch): New function.
* config/bpf/bpf.md (AM mode iterator): Conditionalize support for SI
mode.
(zero_extendsidi2): Only use mov32 instruction if it is available.
(SIM mode iterator): Conditionalize support for SI mode.
(JM mode iterator): New.
(cbranchdi4): Update name, use new JM iterator. Use bpf_expand_cbranch.
(*branch_on_di): Update name, use new JM iterator.
* config/bpf/bpf.opt: (mjmpext): New option.
(malu32): Likewise.
(mjmp32): Likewise.
(mcpu): Likewise.
(bpf_isa): New enum.
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| c++tools | ||
| config | ||
| contrib | ||
| fixincludes | ||
| gcc | ||
| gnattools | ||
| gotools | ||
| include | ||
| INSTALL | ||
| intl | ||
| libada | ||
| libatomic | ||
| libbacktrace | ||
| libcc1 | ||
| libcody | ||
| libcpp | ||
| libdecnumber | ||
| libffi | ||
| libgcc | ||
| libgfortran | ||
| libgo | ||
| libgomp | ||
| libiberty | ||
| libitm | ||
| libobjc | ||
| liboffloadmic | ||
| libphobos | ||
| libquadmath | ||
| libsanitizer | ||
| libssp | ||
| libstdc++-v3 | ||
| libvtv | ||
| lto-plugin | ||
| maintainer-scripts | ||
| zlib | ||
| .dir-locals.el | ||
| .gitattributes | ||
| .gitignore | ||
| ABOUT-NLS | ||
| ar-lib | ||
| ChangeLog | ||
| ChangeLog.jit | ||
| ChangeLog.tree-ssa | ||
| compile | ||
| config-ml.in | ||
| config.guess | ||
| config.rpath | ||
| config.sub | ||
| configure | ||
| configure.ac | ||
| COPYING | ||
| COPYING3 | ||
| COPYING3.LIB | ||
| COPYING.LIB | ||
| COPYING.RUNTIME | ||
| depcomp | ||
| install-sh | ||
| libtool-ldflags | ||
| libtool.m4 | ||
| lt~obsolete.m4 | ||
| ltgcc.m4 | ||
| ltmain.sh | ||
| ltoptions.m4 | ||
| ltsugar.m4 | ||
| ltversion.m4 | ||
| MAINTAINERS | ||
| Makefile.def | ||
| Makefile.in | ||
| Makefile.tpl | ||
| missing | ||
| mkdep | ||
| mkinstalldirs | ||
| move-if-change | ||
| multilib.am | ||
| README | ||
| symlink-tree | ||
| test-driver | ||
| ylwrap | ||
This directory contains the GNU Compiler Collection (GCC). The GNU Compiler Collection is free software. See the files whose names start with COPYING for copying permission. The manuals, and some of the runtime libraries, are under different terms; see the individual source files for details. The directory INSTALL contains copies of the installation information as HTML and plain text. The source of this information is gcc/doc/install.texi. The installation information includes details of what is included in the GCC sources and what files GCC installs. See the file gcc/doc/gcc.texi (together with other files that it includes) for usage and porting information. An online readable version of the manual is in the files gcc/doc/gcc.info*. See http://gcc.gnu.org/bugs/ for how to report bugs usefully. Copyright years on GCC source files may be listed using range notation, e.g., 1987-2012, indicating that every year in the range, inclusive, is a copyrightable year that could otherwise be listed individually.